Liquid-fuel cook stove



Dec."24,- 1929. 5, PICKUP 1,740,746

LIQUID FUEL COOK STOVE v Filed Jan ,17, 1927 2 Sheets-Sheet l Gewye Fae/r p 46441.4 ma m G. E. PICKUP 1,740,746

LIQUID FUEL COOK STOVE Bat. 24, I929.

Filed Jan. 17, 1927 2 Sheets-Sheet 2 74 It we M 24 Patented Dec. 24, 1929 UNETED STATES PATENT OFFlCE GEORGE E. PICKUP, F NEWARK, OHIO, ASSIGNOE TO THE WEHRLE COMPANY, OF NEWARK, OHIO, A CORPORATION OF OHIO LIQUID-FUEL COOK STOVE Application filed January 17, 1927.

The invention relates to a cook stove or range of the type employing gasoline or other readily volatile fuel, and the object of the invention generally stated is to provide a stove of this character which is of a thoroughly practical character, efficient in operation, and convenient of manipulation.

A further object is to provide in a liquid fuel stove, an improved means for heating 1 the fuel chamber of the main generating means, whereby any one or more of a plurality of burners may be operated at will with an economic use of fuel for generating purposes.

In cook stoves, it is customary to provide a plurality of open top burners and also an oven burner, and in the case of gasoline stoves as heretofore constructed it has been necessary to employ one of the open top burners in the generation of the fuel for the oven burners. hus it is necessary to have the open top burner in operation when the oven burner is in use. Another object of my invention is to provide, in combination with 3 the oven burner, a generating means capable of supplying gas thereto independently of the open top burners.

Still another object is to provide generating means for supplying fuel to the open top burners independently of the generating means for the oven burner.

The objects of the invention thus generally stated, together with other and ancillary ad vantages, are obtained by the preferred construction and arrangement illustrated in the acompanying drawings. It should be noted, however, that it is contemplated that various changes in the construction and arrangement illustrated may be made by those skilled in the art without departing from the spirit and scope of the invention.

In the drawings,

Figure 1 is a fragmentary plan section of the upper portion of a cook stove showing the arrangement of the open top burners, an oven burner, and the generating means associated with the main or giant burner.

Fig. 1 is a fragmentary perspective view on a small scale showing the stove more fully.

Fig. 2 is a fragmentary plan section show- Serial No. 161,476.

ing the generating means for the oven burner on a somewhat larger scale.

Fig. 3 is a vertical sectional view taken approximately in the plane of line 33 of Fig. 1.

Fig. 4 is a plan view of a pregenera-tor.

Fig. 5 is a transverse sectional View through the pregenerator.

Referring to Fig. 1, 7 designates generally the stove frame which may be of any suitable or preferred character providing an open top section 8 and an oven section 9. The open top section comprises a main burner 10 and three relatively smaller burners 11, 12 anc 13. The oven section is provided with an oven burner 14, which is in the nature of a secon dary burner.

A manifold generally designated by the numeral 15 is arranged to supply gas through a suitable extension 16 to the burner 10, and extensions 17 18 and 19 supply gas to the burners 11, 12 and 13 respectively. 20 is a fitting which may be formed integral with and constitutes an extension of the manifold for supplying gas to the oven burner 14.

The means for generating the fuel into a gas is associated with the burner 10. This burner is constructed in two substantially segmental sections 21 and 22 spaced apartbut connected by means of a tubular member 23 into one end of which leads the manifold extension 16. A space is thus provided between the two sections of the burner, the tubular member 23 being disposed in a plane below the sections and leading upwardly into the bottom portions thereof. In the upper sides of these burner sections 21 and 22 are the usual slots forming jet orifices and in the straight inner side edge portions of each section are similar slots 23 forming jet orifices arranged to discharge horizontally into the space between the two sections.

Fuel is supplied to the manifold 15 through a generating chamber preferably in the form of a tube 25 extending in a front to rear direction and disposed in said space between the burner sections 21 and 22 so as to receive heat from the jet orifices 23 and also from an auxiliary generating burner 2 f as will he later described. At its rear end the generator tube 25 communicates with the manifold 15 through the medium of an elbow 26, herein in the form of a casting. The forward end of this tube enters a fitting 27 which is connected with a pipe 28 (Fig. 1) leading to a suita is source of fuel supply under pressure, such as a tank 28 (Fig. 1 This fitting 27 may be secured to the top frame member 29 of the stove as by means of a screw 30. The flow of fuel to the manifold 15 through the tube 25 is preferably controlled by a needle valve member 31 formed on the rear end of a rod 32 extending through the fitting 27 and the tube 25 and seating in a fitting 33 provided in the rear end of the tube where it enters the elbow 26.

In the normal operation of the burners of the open top section of the stove, that is to say after the initial or lighting operation, the

generator tube 25 is heated by the burner sections 21 and 22, and the fuel supplied to the tube is fed to the manifold 15 in the form of a gas under the control of the valve 31, the valve operating'rod or stem extending through the tube and fitting 27, and being equipped forwardly of the range with a hand wheel 34. Air is admitted to the fuel discharged into the manifold, as through an opening 26 in the under side of the elbow 26.

In order that the oven burner 14 may be used independently of the open top burner 10, the auxiliary generating burner 24 is employed. This burner in the present instance is elongated in form so as to underlie the tube 25 and at its rear end has a lateral extension 24 leading into the fitting 20 with which the oven burner is connected. Flow of'gas from the manifold 15 to the oven burner 14 is under the control of a valve 24 and this valve is also adapted to control the flow to the burner 24. Thus as shown in Figs. 1 and 2, the valve 24 is arranged to control the discharge through a port 24 into the fitting 20 from the manifold. A suitable operating rod 24 extends forwardly to the front edge of the openstop section of the stove. It will be apparent therefore that when the valve 24" is operated to supply fuel to the oven burner 14, fuel is also supplied to the auxiliary burner 24; but when one or more of the open top burners only are in use, the generation of the fuel is accomplished by the sections 21 and 22 of the open top burner 10.

The initial or lighting operation necessitates a pregeneration of the gas in an auxiliary or pregenerating burner generally designated by the numeral 35. This auxiliary burner comprises a jet tip .36 formed at one terminal end of a coil 37 of copper tubing. The other terminal end 38 connects with a lower extension 39 of the fitting 27 and the flow of gas fuel to the coil 37 is controlled by a suitable valve 40. The coil 37 is enclosed in the present instance within a sheet metal casing 41 substantially rectangular in form but open at front and rear sides. The jet 36 is so arranged as to discharge into the open forward side of this casing and the coil 37 is disposed directly in front of this jet. Also the casing is inclined upwardly and rearwardly beneath the tube 25, the rear end of the casing terminating adjacent the space between the two burner sections 21 and 22 of the main burner 10. At the rear end of the casing the side walls carry inwardly inclined tongues 41 which serve to confine and direct the flame in its discharge against the generating tube. Struck up from the bottom wall of the casing is a lip 42 which serves as a baffle plate in the path of the projected spray or jet of fuel starting from the jet tip 36. This operates to break up the fuel into a mist for more effective combustion. Extending downwardly and forwardly from the casing is an arm 43 carrying a cup 44 which is disposed beneath the jet tip 36 and serves to collect drippings of fuel from the tip. is slit substantially centrally thereof and portions are bent downwardly to form flanges 45 which serve to hold the casing in position on the coil (Fig. 5).

When it is desired to place the stove in" operation, a lighted match is applied to the under side of the casing 41, and the latter being of thinsheet metal in contact with the copper coil 37, the coil becomes quickly heated. The valve 40 is then opened slightly to permit fuel to flow under pressure into the coil and the fuel discharges from the jet tip 36 in the form of a gas which becomes ignited from the flame of the match. The

flame thus produced passes throughthe casing and through the coil enclosed therein and strikes the under side of the generating tube 25. After a brief interval this tube 25 becomes heated sufficiently, and the valve 31 is operated by'turning the hand wheel 34,

thus permitting the flow of gaseous fuel into the manifold. Upon issuing from the jet orifices of the burner 10 or the auxiliary generator burner 24, as the case may be, the gas is ignited by the flame from the pregenerator,

it being notedthatthe pregenerator discharges between the sections of the burner 10 and directly over the generator burner 24. The

valve 40 may now be operated to shut off the 7 flow of fuel from the pregenerator. As will be understood, suitable valves 46 with operating handles 47 in front of the open top section are provided to control the flow of gas from the manifold to the several open top The top wall of the casing 41 to generate the initial gas supply for the pregenerator, and the latter operating to produce a supply of gas for the main generator burner. Moreover, the oven burner is not dependent for its operation upon any of the open top burners of the stove, so that the open top burners, or the oven burner, may be used independently. If desired, the auxiliary generator burner 24: may be employed as a simmering burner during the use of the oven burner.

The particular construction and arrangement herein disclosed constitutes a modification of a generally similar structure disclosed broadly in my copending application Serial No. 129,895, filed August 18, 1926 and containing claims generic to this embodiment. The appended claims are limited to features in this construction and arrangement herein disclosed which are not contained in the aforesaid copending application.

I claim as my invention:

1. In a gasoline cook stove, the combination of a manifold having a plurality of burners in valve-controlled communication therewith, one of said burners being formed in two sections spaced apart but connected together, a generator tube disposed between said two burner sections, said burner sections having orifices arranged to discharge against said tube, and said generator tube being connected at one end with a source of fuel supply and at its other end with said manifold, an auxiliary generator burner connected at one end with said manifold, and a single valve means for controlling the flow of fuel to one of said first mentioned burners and also to the generator burner.

2. A liquid fuel cook stove having, in comhination, a generator tube connected with a fuel supply, a manifold into which said tube is arranged to discharge, a needle valve for controlling such discharge into the manifold, a cooking burner having a connection with said manifold and disposed adjacent said tube to heat the same throughout the major portion of its length, a valve for controlling the flow of fuel from the manifold to the cooking burner, a secondary burner having a connection with the manifold to receive a supply of fuel therefrom, an auxiliary burner also connected with the manifold and positioned adjacent said tube so as to heat the same in substantially the same region as the cooking burner, and a single valve for controlling the flow of fuel to said secondary burner and also to said auxiliary burner but independently of the cooking burner, said auxiliary burner being thereby adapted to effect gasification of fuel in said tube for the supply of the secondary burner.

In testimony whereof, I have hereunto affixed my signature.

GEORGE E. PICKUP. 

